The Greater Glabrezu in UnderSigil

After you return to Sigil from the Planes you will be able to find Greater Glabrezu in UnderSigil, the "dungeon" under the Clerk's Ward. These tough monsters are worth 70,000 experience points each, and when you kill them they drop either a large amount of money or a powerful item.

I ran some tests to figure out exactly how likely you are to find a Greater Glabrezu each time you go into UnderSigil, where they might spawn and what chances you have of finding each item they can drop.

Items

When you kill a Greater Glabrezu it will usually only drop Copper Commons. However, sometimes they will drop one of five rare or unique items instead, all of which are very powerful. For this test I made a script to spawn 1000 Greater Glabrezu and keep track of which of the six item possibilities each ended up with. I ran it three times.

Run 1
Item Number of GG
to have item		 Percentage of GG
to have item
Copper Commons 837 / 1000 83.7%
Aegis of Torment 52 / 1000 5.2%
Bell's Shield 39 / 1000 3.9%
Ring Zero 37 / 1000 3.7%
Umei Kaihen 26 / 1000 2.6%
Heaven and Earth 9 / 1000 0.9%

Run 2
Item Number of GG
to have item		 Percentage of GG
to have item
Copper Commons 853 / 1000 85.3%
Aegis of Torment 49 / 1000 4.9%
Bell's Shield 38 / 1000 3.8%
Ring Zero 27 / 1000 2.7%
Umei Kaihen 18 / 1000 1.8%
Heaven and Earth 15 / 1000 1.5%

Run 3
Item Number of GG
to have item		 Percentage of GG
to have item
Copper Commons 857 / 1000 85.7%
Aegis of Torment 46 / 1000 4.6%
Bell's Shield 42 / 1000 4.2%
Ring Zero 21 / 1000 2.1%
Umei Kaihen 19 / 1000 1.9%
Heaven and Earth 15 / 1000 1.5%

Spawn Probability

Actually finding a Greater Glabrezu in UnderSigil can be difficult. Sometimes you can go down there ten times in a row without finding one, other times you may find two at once. To test just how likely it is that a Greater Glabrezu will be spawned each time you enter UnderSigil I made a script to simulate entering it 1000 times and keep track of how many Greater Glabrezu should have spawned each time.

Number
of GG		 Number of runs to
have that many GG		 Percentage of runs to
have that many GG
0 GG 663 / 1000 66.3%
1 GG 274 / 1000 27.4%
2 GG 58 / 1000 5.8%
3 GG 5 / 1000 0.5%
4 GG 0 / 1000 0%
5 GG 0 / 1000 0%
6 GG 0 / 1000 0%

Spawn Points

This is a map of UnderSigil with all the possible Greater Glabrezu spawn points on it. The three different colors indicate that if you find a Greater Glabrezu at one point you should look for more at the other points of the same color and not bother checking the other colored points during that run in UnderSigil. Finding a Greater Glabrezu at one point does not guarantee that there will be a Greater Glabrezu at the other points of the same color, but simply that those will be the only other possible points during that run for a Greater Glabrezu to spawn.

Go back to Platter's Miscellaneous Torment Crap.